Hi Martin A ,

Thanks for reaching out. Based on the information you've provided, it seems this issue arises when you're trying to open a company file shared with Remote Data Access (RDA). Is this what you're using?

Here are a few steps you can take to resolve this issue:

1. If you've just closed the shared company file, wait a moment before reopening it to ensure the server has had enough time to close the file properly.
2. If the error occurs in multi-user mode, ensure all other users have closed the shared company, then open the file in single-user mode and disable the "Welcome to Remote Data Access" screen from popping up.
3. If the issue persists in both single and multi-user modes, use the Connection Manager to stop and start the service on the machine that's encountering the problem.

For a detailed step-by-step guide, please refer to the article  "Server is too busy. Try again Later.".

If these methods do not resolve the issue, it could be related to your network configuration or permissions. Remember to back up your data before proceeding with any advanced solutions. If you need further assistance or guidance, don't hesitate to reach out.

Warm Regards,
Erzsi